EN ISO 15609 (formerly EN 288 Part 2) Specification and Approval of Welding
Procedures for Metallic MaterialsThis part of the standard defines the contents of a Welding
Procedure Specification in the form of a list of information which should
be recorded.

EN ISO 15614 Part 1 (formerly EN 288 Part 3)Welding Procedure Tests For The Arc
Welding Of Steel, Nickel and Nickel Alloys. This is the most familiar and widely used method
of qualifying welding procedures. It involves the welding of a test
piece representing the production weld in all essential features.
The completed test weld is then subjected to a variety of specific tests
to ensure that the properties of the weld will be acceptable for most stringent
applications. EN ISO 15614 Part 1 Compared to EN 288 Part 3

EN ISO 15614 Part 2 (formerly EN 288 Part 4)Welding Procedure Tests For The Arc
Welding Of Aluminium and Its Alloys.

EN ISO 15614 Part 6Welding procedure test.Arc and gas welding of copper and its alloys.

EN ISO 15614 Part 7Welding procedure test. Overlay welding.

EN ISO 15614 Part 8 Tubeplates for heat exchangers.
This standard as far as I am aware, is only required for heat exchanger tube plates, and not boilers. It replaced BS4870 Part 3,
which appears to be very similar. There is no welder approval standard for this type of joint, use has to be made of EN287/EN ISO 9606.

EN ISO 15610 (formerly EN 288 Part 5) Approval By The Use Of Approved
Consumables. An assumption can be made that a weld carried out using
welding consumbles, approved by an inspection body, in accordance with
the manufacturer’s recommended welding practices will produce welds suitable
for simple fabrication work without the need for any formal testing.

EN ISO 15611 (formerly EN 288 Part 6)Approval By Previouse Welding
Experience. If the same system of welding has been used satisfactorily
on welded fabrications for many years, it can be assumed that the welds
thus produced are acceptable. Unfortunately we know from our knowledge
of linear elastic fracture mechanics that a fine line often exists between
a defective weld providing acceptable service life and one that causes
a serious failure. Therefore this method should be used with caution.

EN ISO 15612 (formerly EN 288 Part 7)Approval By A Standard Welding
Procedure. Fully documented procedures may be purchased, from reputable
authorities, for joining materials that are relatively easy to weld
such as plain carbon and austenitic steels. This route will be useful
to companies which do not wish to get involved with qualifying their own
procedures.

EN ISO 15613 (formerly EN 288 Part 8)Approval By A Pre-Production
Welding Test. If a particular joint geometry cannot satisfy all the
requirements of EN ISO 15614 Part 1 or Part 2 because of its size and testing
requirements then a special test can be carried out representing the joint
in all respects and subjected to as much of the testing required by
EN ISO 15614 for a similar joint type.

BS EN 288 Part 9 Welding procedure test for pipeline
welding on land and offshore site butt welding of transmission pipelines.
This is the most recent addition to EN 288 and is very similar
to BS4515. It is the only standard in the EN 288 series that has not been replaced

The chosen method of procedure approval should take
account of the following points:

The requirements of the application standard. This
is the standard that specifies the welding qualification requirements
for fabricated items such as boilers, pressure vessels or pipework.

Customer specification.

Examiner / Test Body requirements. This is the person
or organisation appointed by the contracting parties to approve the
procedure. The use of a reputable third party inspection Authority
is strongly recommended for the approval of all procedures, as this
may prevent the test having to be repeated to satisfy future contract
requirements.

The load carrying requirement of the weld and the consequence
of failure.

For example, pressure vessels built to PD5500 require all
welding qualifications to be approved by a procedure test to EN ISO 15614 Part 1 or Part 2, formerly EN 288 part
3 or part 4. BS 4870 Part 1 or Part 2 qualifications are still accepted
providing they satisfy the technical intent of EN ISO 15614.

Welder Approval TestsThe European Standards for Welder Approval are EN 287
Part 1 and EN ISO 9606 Part 2 to 5 . They only cover welding processes that are manual or partly
mechanised .ie. where the skill of the welder has a significant influence
on weld quality. Materials to be joined can be wrought, forged or cast.

There is an option (non mandatory) for a job knowledge
test (refer to appendix D of the standard) to be carried out,
which is a departure as far as the UK is concerned. British Standards
in the past have required the welder to be subjected only to a practical
test of his skill, but other countries such as Germany and Austria believe
that he should be required to demonstrate some basic knowledge of the processes
with which he is involved, particularly regarding safety aspects.

Perhaps the most important change these new standards
have introduced, is the requirement for an inspection body to prolong the
welders certificate every 2 years. This has to be done on the basis
of evidence of volumetric examinations carried out on the welders production
work during the 2 year period.

BS 4872 is still available for qualifying welders on less
stringent welding applications such as steel structures or Class 2 pipework
to BS 2971.

EN ISO 5817 (formerly EN 25817) Fusion-welded joints in
steel, nickel, titanium and their alloys — Quality levels for imperfections.
This was an ISO
standard that has been adopted in its entirety by CEN. It gives details,
in tabular form, of 26 types of imperfections. Each imperfection
has three acceptance levels; Stringent (B), Intermediate (C) and Moderate
(D).

EN ISO 15614 Part 1 and EN 287 Part 1 use this standard
as the acceptance criterion for imperfections. Both standards refer
to the same imperfection levels which are Stringent (B) except for profile
defects which are Intermediate (C).

ISO 10042 Arc Welding Joints in Aluminium and its
Weldable Alloys - Guidance on Quality Levels For Imperfections. This
standard is the Aluminium version of ISO 5817. It is
used by EN ISO 15614 Part 2 and EN ISO 9606 Part 2 .